1 files changed, 32 insertions, 0 deletions
diff --git a/rust-book/testing/src/lib.rs b/rust-book/testing/src/lib.rs
new file mode 100755
index 0000000..9ce4804
--- /dev/null
+++ b/rust-book/testing/src/lib.rs
@@ -0,0 +1,32 @@
+pub fn add_two(a: i32) -> i32 {
+    internal_adder(a, 2)
+}
+
+fn internal_adder(a: i32, b: i32) -> i32 {
+    a + b
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn add_two_and_two() {
+        assert_eq!(4, add_two(2));
+    }
+
+    #[test]
+    fn add_three_and_two() {
+        assert_eq!(5, add_two(3));
+    }
+
+    #[test]
+    #[ignore]
+    fn one_hundred() {
+        assert_eq!(102, add_two(100));
+    }
+
+    fn internal() {
+        assert_eq!(4, internal_adder(2, 2));
+    }
+}